/Engine/Source/Editor/MeshPaint/Public/IMeshPaintGeometryAdapter.h
Default functionality for querying textures from a mesh component which are suitable for texture painting
static void DefaultQueryPaintableTextures ( int32 MaterialIndex, const [UMeshComponent](API\Runtime\Engine\Components\UMeshComponent) * MeshComponent, int32 & OutDefaultIndex, [TArray](API\Runtime\Core\Containers\TArray)< struct [FPaintableTexture](API\Editor\MeshPaint\FPaintableTexture) > & InOutTextureList )